First of this isn't the "parking brake" light, the pressure switch is still good, the trans brake seems to be operating normally shifting from park to drive as well as activating the parking brake on and off

So with that said randomly the other day the auto park light on our 2000 Newman isn't going off. Any thoughts or ideas where to start or what to look for?

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I have a 2000 RV on a 1999 P32 chassis - probably the same chassis as yours. I saw those indications last year and replaced the RGS with a spare I had (about 15 minute job) and it fixed my problem.
I'm not an expert, but here are some thoughts:
The pump has it's own internal pressure shut down (at a higher PSI than the RGS) that may be creating a false impression that the pressure switch (RGS) is good. The RGS can short out causing a constant pump run order then your AutoPark's pressure is too high and being regulated by the pump.

If it was me (and it was last year) I'd replace both the RGS and pressure switches then test it - if it isn't fixed keep those switches as spares and
Contact oldusedbear (Rodger) via email (his info is in the above link) he'll walk you thru T/S ing it.
Here are parts info:http://oemys-performance.com/autoparkparts.htm
Note: some feel the Brown pressure switch (15034355) is of better quality than the Green pressure switch (15961566).

__________________
Tom and Amy from Northern Virginia.
2000 Allegro 454/Workhorse P32/TST/Crossfire
Life is a DIY project, so own less and live more

I needed to replace the Auto park brake shoes and I found that I could go to several places and get the original shoes number 15619929. The price ranges from $87.00 up to over $130.00. After much investigation I was able to get a set, actually 4 shoes from AutoZone for only $25.00. I just asked for number 449 shoes and they had them in stock. Installed as originals and seem to work great.

I needed to replace the Auto park brake shoes and I found that I could go to several places and get the original shoes number 15619929. The price ranges from $87.00 up to over $130.00. After much investigation I was able to get a set, actually 4 shoes from AutoZone for only $25.00. I just asked for number 449 shoes and they had them in stock. Installed as originals and seem to work great.

Tim, this is good info - would you please start a new post/thread titled 'AutoPark brake shoes' and paste this info in it please. That will make it easier to find.

__________________
Tom and Amy from Northern Virginia.
2000 Allegro 454/Workhorse P32/TST/Crossfire
Life is a DIY project, so own less and live more